Projector and Projector System

1. A projector configured to be able to connect with an other projector via a communication cable including a power line, comprising: an image projecting unit that modulates light emitted from a light source and projects the light; a power supply detecting unit that detects, in a standby state, the supply of power via the power line from the other projector; and a control unit that performs control to switch an operating state of the projector between the standby state and a normal operating state, wherein, when the supply of power of the power line is detected by the power supply detecting unit, the control unit is activated from the standby state to the normal operating state, and the control unit determines whether or not a connection destination of the communication cable is a projector when the supply of power of the power line is detected by the power supply detecting unit, and when the connection destination is determined to not be a projector, the control unit switches the operating state from the normal operating state to the standby state.

2. The projector according to claim 1 , further comprising: an input operating unit that accepts an input operation; and a power source unit that supplies power to the power line, wherein in the case where the operating mode of the projector is set to a first operating mode via the input operating unit, the control unit issues a light source turn-on command instructing to turn on a light source of the other projector via the communication cable after the power source unit supplies power to the power line.

3. The projector according to claim 2 , wherein in the case where the operating mode of the projector is set to a second operating mode via the input operating unit, the control unit is activated from the standby state to the normal operating state when the supply of power of the power line is detected by the power supply detecting unit.

4. The projector according to claim 1 , further comprising a light source control unit that controls the turn-on of the light source, wherein if the connection destination is determined as a projector, the control unit accepts a light source turn-on command from the other projector and initiates the turn-on of the light source with the light source control unit.

5. The projector according to claim 1 , further comprising: a cooling fan that cools the image projecting unit; and a cooling control unit that controls the operation of the cooling fan, wherein if the connection destination is determined as a projector, the control unit starts the rotation of the cooling fan with the cooling control unit.

6. The projector according to claim 1 , wherein the communication cable is a USB cable, and the power line is a USB standard VBUS.

7. The projector according to claim 1 , the projector being configured to be able to connect with a plurality of other projectors including a first other projector and a second other projector, further comprising: a power source unit that supplies power to the power line, wherein the power supply detecting unit detects, in a standby state, the supply of power via the power line from the first other projector, and power is supplied to the power line to thereby notify the second other projector that the projector is powered on.

8. The projector according to claim 7 , further comprising a control unit that issues, to the second other projector activated by detecting the supply of power to the power line, a light source turn-on command instructing to turn on a light source of the second other projector via the communication cable.

9. A projector system comprising a first projector and a second projector that are connected via a communication cable including a power line, the first projector comprising: an image projecting unit that modulates light emitted from a light source and projects the light; a power supply detecting unit that detects, in a standby state, the supply of power via the power line from the second projector; and a control unit that performs control to switch an operating state of the projector between the standby state and a normal operating state, wherein, when the supply of power of the power line is detected by the power supply detecting unit, the control unit is activated from the standby state to the normal operating state, and the control unit determines whether or not a connection destination of the communication cable is a projector when the supply of power of the power line is detected by the power supply detecting unit, and when the connection destination is determined to not be a projector, the control unit switches the operating state from the normal operating state to the standby state, and the second projector comprising: an image projecting unit that modulates light emitted from a light source and projects the light; and a power source unit that supplies power to the power line, wherein, power is supplied to the power line to thereby notify the first projector that the projector is powered on.